Inverter output???

[Daryles]

I bought a Go Wise P1003 2000W (4000w surge) pure sine wave inverter. While testing it, I ohmed between the ground, neutral and hot on the 120vac outlet receptacle. No connection.
I repeated this on the chassis ground point. Only the chassis ground and the 120vac receptacle ground are connected.
I connected the inverter to the battery. Checked for voltage using the chassis ground for -ve.
The hot side of the 120vac outlet read 37vac.
The neutral side of the 120vax outlet read 47vac.
Then I read between the hot and the neutral and got 121vac.
I'm guessing this is normal since it works???
Plugged in a small fan. Works fine.
Plugged in a 1000W microwave. Works fine.
TV, satellite, Nintendo, DVD player all works fine. Although several of those devices have their own external power brick. Actually when you think about it all electronic devices convert 120vac to DC for their internal use.
Anyone else have results like this from their inverter???
BTW,
Does anyone going to the rally happen to have an oscilloscope?
I would like to confirm this inerter is actually a pure sine wave one.
Thanks.

[carlrx7]

If you add a filament light bulb circuit between neutral and ground does it light up? This will check if there is actually current on those or just a floating voltage. If the bulb lights up, do not bond the neutral and ground or it will burn up the inverter.

[Daryles]

Thanks Carl.
I posted this on RVELECTRICITY FB group also.
Very knowledgeable people there. One explained this in normal operation for these kind of inverters. They also advised against a bonding plug.
The last item I wanted to test is my air conditioners. I have 552Ah of lithium batteries (552A x 12vdc = 6,624Wh).
The A/C draw is 13A x 120vac (=1,560Wh).
So theoretical I can run the A/C 4.2 hours. In reality probably 3 hours with other draws not accounted for.

[carlrx7]

Do you have a soft start device on the a/c? 3 hours is about right. I have 555ah as well.

[Daryles]

Yes I have a SoftStartRV on the A/C

[carlrx7]

Maybe this will help:

https://diysolarforum.com/threads/is...1001/post-8811

Delta-V said:
Plug a box fan or osculating fan into it. If it's a modified Sine Wave, it will usually hum and not be as strong (RPM's) compared to plugging it into utility power. Compare the difference.

The price seems too good to be true for a Pure Sine Wave Inverter. For a 3000 Watt Pure Sine Wave Inverter, prices average around $270 USD or more.

[Daryles]

Originally Posted by carlrx7

Maybe this will help:

https://diysolarforum.com/threads/is...1001/post-8811

Thanks.
Good info

[John.H.Hamel]

If you put any load on the GFI between the Hot and Ground, it will trip the GFI. This is by design. It is to prevent you from getting shocked. The GFI makes sure every electron that travels to/from the hot is also travels to/from the neutral. If your ACV meter was not high impedance, it would have tripped the GFI.